Island



iUNITED STATES PATENT OFFICE.

STEPHEN S. BURLINGAME, OF W'ARVICK, RHODE ISLAND, ASSIGNOR TO HIMSELFAND VILLIAM TAYLOR, OF SAME PLACE.

BANK-LOCK.

Specification of Letters Patent No. 21,862, dated October 19, 1858.

To all whom it ma concern:

Be it known tiat I, STEPHEN S. BUR- LINGAME, of lVarwick, in the countyof Kent and State ot' Rhode Island, have invented certain new and usefulImprovements in Bank-Locks; and I do hereby declare that the same aredescribed and represented in the following specification and drawings.

To enable others skilled in the art to make and use my improvements Iwill proceed to describe their construction and operation referring tothe drawings in which the same letters indicate like parts in each ofthe figures.

Figure l, is a plan ot the interior of the lock. Fig. 2, is an elevationof the lock with one side removed. Fig. 3, is an elevation of the plateof the lock; Fig. 4, the underside of the plate of the lock.

The nature of my invention consists in one or more pairs of springslides, arranged to close the key hole, when the key is withdrawn andlock the working key, the slides being so constructed as to be pushedopen by the point and bits of the key when it is inserted, also inproviding the working key with spring pawls to lock it when the key isWithdrawn, the pawls being so constructed and arranged as to be pushedout by the bits of the key when it is inserted, also in locking the 2dworking key and stopping the key hole by a sliding` tube or collar,pushed out by a spring and locked by a bolt, and in fastening theworking key to the back plate oi the lock by a flange and countersunkplate.

In the accompanying drawings A, is the plate of the lock, B, B, thesides of the case provided with an opening O, shown in Fig. 5, to letany powder escape that may be put into the lock to blow it oii'; D, D,the ends of the case, E, the back plate or cover.

In this lock four bolts 1, 2, 3, 4, are represented that is one workingthrough each side and end of the lock. The rear ends of these bolts areprovided with slots iitted to traverse on the standards a., b, c, d,fastened to the plate A, to support and steady the rear ends of saidbolts. The bolts l, and 2, are locked out by the pins e, e, which catchbehind their ends, and are locked when drawn in by the same pins fallinginto the notches f, f, in the bolts. The pins e, e, are fastened in thelever F, which vibrates on the stud G, shown by dotted lines in Fig. l,

which is fastened in the plate A. This lever F, is provided wit-h across or arin H, carrying the pin g, which catches into the notches inthe bolt 3, to lock it in or out.

I, is a lever arranged to vibrate on the stud J, and carries a pin L,which catches into the notches in the bolt 4, to lock it in or out. Thislever I, is operated by the end of the cross H, as shown by dotted linesat K, Fig. l. These levers are all operated by the two ends of thespring L, in the stud M, (shown by dotted lines in Fig. 1,) and arrangedto press the pins into the notches in all the bolts. The pin 2', in theback end of the bolt l, vibrates the lever N, on the stud O, andtraverses the bolt 3, by the pin y'. The link P, connects the pin tothelever It which vibrates on the stud Q and traverses the bolt 2, by thepin Q. The pin i', in the bolt l, vibrates the lever N, on the stud O,and traverses the bolt Ll, by 'the pin j.

S, is a stud fastened into the plate A, and provided with a collar S',with a score 7c, across its upper end, which receives the bits le', c,of the working key T, Fig. 4. This collar S traverses on the stud and isprevented from turning by the pin Z, in the stud S, shown by dottedlines in'Fig. 2, the collar having a slot in it so as to traverse on thepin l. The spring U. fastened to the plate A, acts against the lower endoi the collar S', and presses it out into the working key T, so as tostop the key hole and lock the key T, by catching the bits 7e', in thescore 7c. The working key T, consists of a short cylinder, with a iangearound one end, fitted to a countersink in the plate T, which isfastened to the back plate E, so as to hold the working key firmly tothe plate and allow it to turn freely. This key T, has the two bits71:', on the inside to which the score 7:2 in the key T2 is fitted seeFig. 6. This key T2 is applied through a hole in the door and when it isput in it pushes the collar S, down below the bits 7s', so as to releasethe working key T, and turn it and carry the bit Z, against theprojection Z2, on the lever F and raise it so as to throw all thelocking pins out of the bolts, and then move the bolts by acting againstone side ot' the score K in the bolt l; and after the bolts are movedthe key T2 may be turned to the right position for the collar S', torise and catch. the bits le, and lock the working key T.

The collar S, is locked up into the working key T, by the forked slidingbolt V, which is traversed under it and under the end of the spring U,for that purpose. The bolt V has two slots in it for the screwsfV, V,which hold it to the plate A, and allow it to traverse; it is alsoprovided with four' projections V2, against which the working key IV,acts to traverse the bolt V. This key IV, consists of a collar, Fig. 7,with a bit m, to act on the projections V2, of the bolt V. It also has aflange X, around its upper end with scores min, for the pins which lockit, and holes o, in its sides for the spring pawls p, p, which catchinto them. There are also slots on the inside at the upper endterminating in the holes 0, 0, so that when the bits Y, Y, are pushed inthey press out the pawls p, p, the key W, being arranged to turn on astud in the plate A.

The key, Z, Fig. 8, is made in the form shown in the drawing with bitsY, Y, above mentioned and a conical point Y, to press open the springslides Q, Q. These slides are arranged to slide right over the key IV,and between it and the end of the tuberZ, Fig. 3, fastened to the plateE, through which tube the key Z, is inserted. The shanks of the slidesQ, Q, traverse in the boxes Q-, Q fastened to the plate A. These slidesare pressed toward each other by the springs Q2 Q2 fastened to the plateA. There are some pins i", r, in the slides Q, Q, which pins enter thenotches n, n, in the working key 7, to lock it when the slides cometogether, and prevent it from being turned and hold the working key lV,until the key Z is inserted and the slides pressed apart.

To unlock this lock, the key Z, is put into the key hole Z2 the point Y,presses apart the slides Q, Q, so that the bits Y, Y, enter betweenthem, the key Z, is now turned one fourth around and pushed into theworking key W, so as to push out the spring pawls p, p, and release thekey W, which is turned four times around to draw back the bolt V, andallow the working key T2, to be pushed in and turn the working key T, soas to draw in all the bolts.

Although I have described but oneJ set of slides Q, Q, to close the keyhole, I contemplate that another pair may be arranged at right anglesabove them, or a series of pairs if desired with pins for the notches1i, a.

I believe I have described and represented my improvements in bank locksso as to enable any person skilled in the art to make and use them. Iwill now state what I desire to secure by Letters Patent to wit:

I claiml. One or more pairs of spring slides Q, Q, to close the key holeZ2 provided with pins to enter the notches n, n, and lock the collar orworking key W7, the slides being so constructed as to be pushed open bythe point and bits of the key Z when it is inserted as described.

2. I claim the collar or working key IV, in combination with the pawls29, p, so constructed and arranged as to be pushed out by the bits Y, Y,of the key Z, when it is inserted as described.

3. I claim closing the key hole and locking the working key T, by thesliding tube or collar S, pushed out by a spring and locked in the keyhole by the bolt V, as described.

4. I claim fastening the working key T, to the back plate of the lock bymeans of a flange and plate substantially in the manner described.

STEPHEN S. BURLINGAME.

I. DENNIS, Jr., J. F. CALLX.

